本文整理汇总了Golang中github.com/decred/dcrwallet/walletdb.Namespace.Begin方法的典型用法代码示例。如果您正苦于以下问题：Golang Namespace.Begin方法的具体用法？Golang Namespace.Begin怎么用？Golang Namespace.Begin使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类github.com/decred/dcrwallet/walletdb.Namespace的用法示例。
在下文中一共展示了Namespace.Begin方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Golang代码示例。
示例1: testManualTxInterface
// testManualTxInterface ensures that manual transactions work as expected.
func testManualTxInterface(tc *testContext, namespace walletdb.Namespace) bool {
// populateValues tests that populating values works as expected.
//
// When the writable flag is false, a read-only tranasction is created,
// standard bucket tests for read-only transactions are performed, and
// the Commit function is checked to ensure it fails as expected.
//
// Otherwise, a read-write transaction is created, the values are
// written, standard bucket tests for read-write transactions are
// performed, and then the transaction is either commited or rolled
// back depending on the flag.
populateValues := func(writable, rollback bool, putValues map[string]string) bool {
tx, err := namespace.Begin(writable)
if err != nil {
tc.t.Errorf("Begin: unexpected error %v", err)
return false
}
rootBucket := tx.RootBucket()
if rootBucket == nil {
tc.t.Errorf("RootBucket: unexpected nil root bucket")
_ = tx.Rollback()
return false
}
tc.isWritable = writable
if !testBucketInterface(tc, rootBucket) {
_ = tx.Rollback()
return false
}
if !writable {
// The transaction is not writable, so it should fail
// the commit.
if err := tx.Commit(); err != walletdb.ErrTxNotWritable {
tc.t.Errorf("Commit: unexpected error %v, "+
"want %v", err, walletdb.ErrTxNotWritable)
_ = tx.Rollback()
return false
}
// Rollback the transaction.
if err := tx.Rollback(); err != nil {
tc.t.Errorf("Commit: unexpected error %v", err)
return false
}
} else {
if !testPutValues(tc, rootBucket, putValues) {
return false
}
if rollback {
// Rollback the transaction.
if err := tx.Rollback(); err != nil {
tc.t.Errorf("Rollback: unexpected "+
"error %v", err)
return false
}
} else {
// The commit should succeed.
if err := tx.Commit(); err != nil {
tc.t.Errorf("Commit: unexpected error "+
"%v", err)
return false
}
}
}
return true
}
// checkValues starts a read-only transaction and checks that all of
// the key/value pairs specified in the expectedValues parameter match
// what's in the database.
checkValues := func(expectedValues map[string]string) bool {
// Begin another read-only transaction to ensure...
tx, err := namespace.Begin(false)
if err != nil {
tc.t.Errorf("Begin: unexpected error %v", err)
return false
}
rootBucket := tx.RootBucket()
if rootBucket == nil {
tc.t.Errorf("RootBucket: unexpected nil root bucket")
_ = tx.Rollback()
return false
}
if !testGetValues(tc, rootBucket, expectedValues) {
_ = tx.Rollback()
return false
}
// Rollback the read-only transaction.
if err := tx.Rollback(); err != nil {
tc.t.Errorf("Commit: unexpected error %v", err)
return false
}
//.........这里部分代码省略.........